California Code, Civil Code - CIV § 3507.4

The distributor who furnished a motion picture to a person who is made a defendant in an action under this title, and the producer of a motion picture which is the subject of this title shall be jointly and severally liable, upon proof and after an opportunity to appear and interpose any appropriate defenses, to such person and the exhibitor for damages, including loss of profits, attorney's fees, and other costs of defending such action. Such distributor and such producer shall actively assist in such defense to the extent that such person possesses information necessary to such defense concerning the production of the motion picture which is not otherwise available to the defendant. The exhibitor shall not be liable upon any portion of any contract made on or after January 1, 1979, which requires the exhibition or advertisement of a motion picture subject to this title on or after the date of the filing of any action under this title, if the motion picture by final decision of a court is determined to be a nuisance under this title.